123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import {  Buffer,  cacheDir,  colors,  copy,  ensureDir,  gunzip,  path,  Untar,} from "./deps.ts";
const wasmOptFileName = Deno.build.os === "windows"  ? "wasm-opt.exe"  : "wasm-opt";const tag = "version_109";
export async function runWasmOpt(filePath: string) {  const binPath = await getWasmOptBinaryPath();  const p = Deno.run({    cmd: [binPath, "-Oz", filePath, "-o", filePath],    stderr: "inherit",    stdout: "inherit",  });  const status = await p.status();  p.close();
  if (!status.success) {    throw new Error(`error executing wasmopt`);  }}
async function getWasmOptBinaryPath() {  const cacheDirPath = cacheDir();  if (!cacheDirPath) {    throw new Error("Could not find cache directory.");  }  const tempDirPath = path.join(cacheDirPath, "wasmbuild", tag);  const wasmOptExePath = path.join(    tempDirPath,    `binaryen-${tag}/bin`,    wasmOptFileName,  );
  if (!(await fileExists(wasmOptExePath))) {    await downloadBinaryen(tempDirPath);    if (!(await fileExists(wasmOptExePath))) {      throw new Error(        `For some reason the wasm-opt executable did not exist after downloading at ${wasmOptExePath}.`,      );    }  }
  return wasmOptExePath;}
async function fileExists(path: string) {  try {    await Deno.stat(path);    return true;  } catch (err) {    if (err instanceof Deno.errors.NotFound) {      return false;    } else {      throw err;    }  }}
async function downloadBinaryen(tempPath: string) {  console.log(    `${colors.bold(colors.green("Caching"))} wasm-opt binary...`,  );
  const response = await fetch(binaryenUrl());  if (!response.ok) {    throw new Error(`Error downloading wasmopt: ${response.statusText}`);  }  const buf = new Uint8Array(await response.arrayBuffer());  const decompressed = gunzip(buf);  const untar = new Untar(new Buffer(decompressed));
  for await (const entry of untar) {    if (      entry.fileName.endsWith(wasmOptFileName) ||      entry.fileName.endsWith(".dylib")    ) {      const fileName = path.join(tempPath, entry.fileName);      await ensureDir(path.dirname(fileName));      const file = await Deno.open(fileName, {        create: true,        write: true,        mode: 0o755,      });      try {        await copy(entry, file);      } finally {        file.close();      }    }  }}
function binaryenUrl() {  const target = {    "linux": "x86_64-linux",    "darwin": "x86_64-macos",    "windows": "x86_64-windows",  }[Deno.build.os];  return new URL(    `https://github.com/WebAssembly/binaryen/releases/download/${tag}/binaryen-${tag}-${target}.tar.gz`,  );}